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+.\" $NetBSD: pthread_create.3,v 1.9 2023/04/29 21:37:07 uwe Exp $
+.\"
+.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.\" Copyright (c) 1996 John Birrell <jb@cimlogic.com.au>.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\" must display the following acknowledgement:
+.\" This product includes software developed by John Birrell.
+.\" 4. Neither the name of the author nor the names of any co-contributors
+.\" may be used to endorse or promote products derived from this software
+.\" without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD: src/lib/libpthread/man/pthread_create.3,v 1.16 2002/09/16 19:29:28 mini Exp $
+.\"
+.Dd July 9, 2010
+.Dt PTHREAD_CREATE 3
+.Os
+.Sh NAME
+.Nm pthread_create
+.Nd create a new thread
+.Sh LIBRARY
+.Lb libpthread
+.Sh SYNOPSIS
+.In pthread.h
+.
+.Ft int
+.Fo pthread_create
+.Fa "pthread_t * restrict thread"
+.Fa "const pthread_attr_t * restrict attr"
+.Fa "void *(*start_routine)(void *)"
+.Fa "void * restrict arg"
+.Fc
+.
+.Sh DESCRIPTION
+The
+.Fn pthread_create
+function is used to create a new thread, with attributes specified by
+.Fa attr ,
+within a process.
+If
+.Fa attr
+is
+.Dv NULL ,
+the default attributes are used.
+.Pp
+The attributes specified via
+.Fa attr
+are copied into the new thread.
+Any subsequent modifications to the attributes object
+.Fa attr
+points to will have no effect upon already-created threads.
+It is thus also safe to pass the same
+.Fa attr
+to multiple calls to
+.Fn pthread_create .
+.Pp
+Upon
+successful completion
+.Fn pthread_create
+will store the ID of the created thread in the location specified by
+.Fa thread .
+The thread is created executing
+.Fa start_routine
+with
+.Fa arg
+as its sole argument.
+.Pp
+If the
+.Fa start_routine
+returns, the effect is as if there was an implicit call to
+.Xr pthread_exit 3
+using the return value of
+.Fa start_routine
+as the exit status.
+Note that the thread in which
+.Fn main
+was originally invoked differs from this.
+When it returns from
+.Fn main ,
+the effect is as if there was an implicit call to
+.Xr exit 3
+using the return value of
+.Fn main
+as the exit status.
+.Pp
+The signal state of the new thread is initialized as:
+.Bl -bullet -offset indent
+.It
+The signal mask is inherited from the creating thread.
+.It
+The set of signals pending for the new thread is empty.
+.El
+.Sh RETURN VALUES
+If successful, the
+.Fn pthread_create
+function will return zero.
+Otherwise an error number will be returned to
+indicate the error.
+.Sh ERRORS
+.Fn pthread_create
+shall fail if:
+.Bl -tag -width Er
+.It Bq Er EAGAIN
+The system lacks the necessary resources to create another thread, or
+the system-imposed limit on the total number of threads in a process
+.Dv PTHREAD_THREADS_MAX
+would be exceeded.
+.It Bq Er EINVAL
+The value specified by
+.Fa attr
+is invalid.
+.El
+.Sh SEE ALSO
+.Xr fork 2 ,
+.Xr pthread_attr 3 ,
+.Xr pthread_cleanup_pop 3 ,
+.Xr pthread_cleanup_push 3 ,
+.Xr pthread_exit 3 ,
+.Xr pthread_join 3
+.Sh STANDARDS
+The function conforms to
+.St -p1003.1-2001 .